Cochise College          Photos of Minerals

                          Geology Home Page                

                          Roger Weller, geology instructor

                          wellerr@cochise.edu
                                  copyright 2006-R.Weller
 

 

Mineral Information on:
brochantite


Chemical Group:  sulfate

Chemical Formula: 
Cu4SO4(OH)6

Color:     emerald-green to blackish-green          Streak:  pale green

 

Hardness:  3.5 to 4         Specific Gravity:    3.97                  

Luster:  vitreous            Transparency:  transparent to translucent

Cleavage:  one direction, perfect

 

Crystal Forms: Monoclinic system
     prismatic to acicular crystals; also drusy, massive, or granular

Mineral Associations:  found in oxidized zone of copper deposits

Identifying Characteristics:

Uses:  copper ore

Occurrences:   Chile, Arizona, Utah